package com.itheima.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.IdWorker;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.common.BaseContext;
import com.itheima.common.CustomException;
import com.itheima.entity.*;
import com.itheima.mapper.OrderMapper;
import com.itheima.service.*;
import com.sun.org.apache.xpath.internal.operations.Or;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.web.bind.annotation.GetMapping;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;

@Service
public class OrderServiceImpl extends ServiceImpl<OrderMapper, Orders> implements OrderService {
    @Autowired
    private ShoppringCartService shoppringCartService;
    @Autowired
    private UserService userService;
    @Autowired
    private AddressBookService addressBookService;
    @Autowired
    private OrderDetailService orderDetailService;


    /**
     * 用户下单
     *
     * @param orders
     */
    @Override
    @Transactional
    public void sumbit(Orders orders) {
        //获得当前用户id
        Long userId = BaseContext.getCurrentId();

        //查询当前用户的购物车数据
        LambdaQueryWrapper<ShoppingCart> wrapper = new LambdaQueryWrapper<>();
        wrapper.eq(ShoppingCart::getUserId, userId);
        List<ShoppingCart> shoppingCarts = shoppringCartService.list(wrapper);

        if (shoppingCarts == null || shoppingCarts.size() == 0) {
            throw new CustomException("购物车为空,不能下单");
        }

        //查询用户数据
        User user = userService.getById(userId);

        //查询地址数据
        Long addressBookId = orders.getAddressBookId();
        AddressBook addressBook = addressBookService.getById(addressBookId);
        if (addressBook == null) {
            throw new CustomException("用户地址信息有误 不能下单");
        }
        //订单号
        long orderId = IdWorker.getId();

        AtomicInteger amount = new AtomicInteger(0);

        List<OrderDetail> orderDetailList = new ArrayList<>();
        //组装订单明细信息
        shoppingCarts.forEach(item -> {
            OrderDetail orderDetail = new OrderDetail();

            orderDetail.setOrderId(orderId);
            orderDetail.setNumber(item.getNumber());
            orderDetail.setDishFlavor(item.getDishFlavor());
            orderDetail.setDishId(item.getDishId());
            orderDetail.setSetmealId(item.getSetmealId());
            orderDetail.setName(item.getName());
            orderDetail.setImage(item.getImage());
            orderDetail.setAmount(item.getAmount());
            amount.addAndGet(item.getAmount().multiply(new BigDecimal(item.getNumber())).intValue());
            orderDetailList.add(orderDetail);
        });

        //组装订单数据
        orders.setId(orderId);
        orders.setOrderTime(LocalDateTime.now());
        orders.setCheckoutTime(LocalDateTime.now());
        orders.setStatus(2);
        orders.setAmount(new BigDecimal(amount.get())); //总金额
        orders.setUserId(userId);
        orders.setNumber(String.valueOf(orderId));
        orders.setUserName(user.getName());
        orders.setConsignee((addressBook.getProvinceName() == null ? "" : addressBook.getProvinceName())
                + (addressBook.getCityName() == null ? "" : addressBook.getCityName())
                + (addressBook.getDistrictName() == null ? "" : addressBook.getDistrictName())
                + (addressBook.getDetail() == null ? "" : addressBook.getDetail()));

        //向订单表插入数据  一条数据
        this.save(orders);

        //向订单表明细插入数据  多条数据
        orderDetailService.saveBatch(orderDetailList);

        //情况购物车数据
        shoppringCartService.remove(wrapper);
    }

    /**
     * 客户端订单明细
     * @param page
     * @param pageSize
     * @param number
     * @param startTime
     * @param endTime
     */
    @Override
    public Page orderDetail(int page, int pageSize, String number, String startTime, String endTime) {

        Page<Orders> pageInfo = new Page<>(page, pageSize);
        LambdaQueryWrapper<Orders> queryWrapper = new LambdaQueryWrapper<>();

        queryWrapper.like(StringUtils.isNotEmpty(number),Orders::getNumber,number)
                .lt(StringUtils.isNotEmpty(startTime),Orders::getCheckoutTime,startTime)
                .gt(StringUtils.isNotEmpty(endTime),Orders::getOrderTime,endTime);

        Page<Orders> ordersPage = page(pageInfo, queryWrapper);
        return ordersPage;
    }

    /**
     * 手机端历史订单
     * @param page
     * @param pageSize
     * @param number
     */
    @Override
    public Page orderPage(int page, int pageSize, String number) {
        Page<Orders> pageInfo = new Page<>(page,pageSize);
        LambdaQueryWrapper<Orders> queryWrapper = new LambdaQueryWrapper<>();

        queryWrapper.like(StringUtils.isNotEmpty(number),Orders::getNumber,number);

        Page<Orders> ordersPage = page(pageInfo, queryWrapper);
        return ordersPage;
    }


}
